US2042163A - Typewriting machine - Google Patents

Description

May 26, 1936. J. A. B. SMITH TYPEWRITING MACHINE Filed April 27, 1955 2 Sheets-Sheet 1 INVENTOR= May 26, 1936. J.'A. B. SMITH TYPEWRITI NG MACHINE 2 Sheets-Sheet 2 Filed April 2'7, 1335 INVI'LNTOR= $5M ATT NEY.

Patented May 26, 1936 TE'i' TYPEWRITING MACHINE Application April 27, 1935, Serial No. 18,516

21 Claims.

This invention relates to means for selectively gaging the return of a typewriter-carriage to paragraph and no-paragraph line-starting positions. There are employed, for selective co-operation with the usual carriage-return-limiting marginstop that is settable along the range of carriagetravel, two counter-stops, one for no-paragraph, and the other for paragraph line-starts.

One object of the invention is to expedite the typing operations by providing means whereby determination, at will, of returning the carriage to a paragraphing-line start, and the resumption thereafter of the condition, without furtherattention by the typist, for non-paragraphing-line starts, is simplified in that it requires of the typist only a single and momentary pressing of a key or button; it being a further object to arrange such key or button so that it may be passed over, and coincidentally pressed, by substantially the same sweep of the hand the typist usually uses to reach the conventional line-spacing and carriage-returning handle. Thus the time heretofore taken by the typist in adjusting the carriage to a paragraphing-line-start position is practically eliminated, and the time-saving is accomplished practically without requiring extra effort of the typist, since paragraph-determination is made an easily executed momentary incident to operation of said conventional line-spacing and carriage-return handle.

A further object of the invention is to have said means simple, reliable in operation, durable, and inexpensively applicable to existing designs of typewriters, such as the standard Underwood, with reference to which the invention is herein illustrated and described.

A feature of the invention resides in that the automatic restoration of the condition for nonparagraphing-line starts may be effected coincidentally with the usual escapement-limited drop-back movement of the carriage which follows the arrest of the latter by means of the paragraphing-counter-stop. Thus, should the carriage have been inadvertently settled in paragraphing-position, it may at once be re-set to the non-paragraphing-position.

To the above and other ends, the paragraphccunter-stop may be part of a member movably mounted on the carriage-frame and spring pressed, so that it tends to move the paragraphcounter-stop into position for co-operation with a carriage-return-limiting margin-stop on the machine-frame. A spring-pressed latch normally restrains said member, so that the non-paragraphing-counter-stop, which, for a reason which will be hereinafter explained, is preferably also made part of said member, is normally effective. The aforesaid key or button may be positioned adjacent the line-space and carriage-return lever, and a momentary pressing upon said key or button may operate the latch to release the counter-stop-member to move the paragraphingcounter-stop into effective position, and at the same time render the non-paragraphing counterstop ineffective. In thefollowing carriage-return movement, a carriage-arresting lug on the margin-stop frame may be by-passed by a restoring element on the carriage, and which element consequently takes up a position behind said lug, and is therefore caused to be displaced relatively to the carriage as the latter takes the aforesaid drop-back movement. This relative displacement of said restoring element may be used to cause restoration of the counter-'stop-member, and relatching of the same in non-paragraphing-condition.

Said counter-stop-member may be arranged so that it may be independently operated, at will, to divert both counter-stops, so that the carriage may override the margin-stop, or, in other Words, so that the carriage-return movement will not be limited by the margin-stop. The arrangement may further be such that an independent operation of said counter-stop-member will cancel paragraphing determined by operation of the paragraph-key.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a front view of the carriage and carriage-return-gaging mechanism, and illustrates restoration of said mechanism to nonparagraphing-condition coincidentally with the carriage drop-back movement.

Figure 2 is a perspective view of the carriage and carriage-return-gaging mechanism, certain parts being sectioned and broken away for clear ness.

Figure 3 is a fragmentary part-sectioned side view showing details of mounting the paragraphkey adjacent the line-space lever.

Figure 4 is a front view of the carriage and carriage-return-gaging mechanism, and shows the latter in its normal or non-paragraphing condition.

Figure 5 is a View similar to Figure 4, and indicates the return of the carriage for a paragraphing-line start.

Figure 6 is a fragmentary front View illustrating an arrangement and the operation thereof, whereby the paragraphing and non-paragraphing counter-stops may be diverted to permit the carriage to override the margin-stop that is settable along the range of carriage-travel.

In the Underwood machine, types represented at l5, write in lines It across a work-sheet l7, positioned around a platen l8, journaled in a carriage l 9. Said carriage has a frame 29 formed by side-bars 2|, a front-bar 22 of inverted L-section, see Figure 6, and a rear bar (not shown). The carriage-frame 29 runs upon a rear rail (not shown), and has a front-roller 24 running upon a front rail-rod 25, supported by standards 26 of the machine-frame.

A spring-tape 2? (Figure 5) urges the carriage in letter-feed steps controlled, at the typing operation at which the types enter the usual type' ment of the carriage.

A margin-stop 36 co-operates, as will presently be described, to gage the carriage-return movement to line-starting positions. Said marginstop 36 has a slidable bearing upon the rail-rod 25am also upon a rod 31 supported in the standards 26. Rail-rod teeth 38 are dogged by a retractible arm 39 of the margin-stop '36, to locate the latter along the range of carriage-travel.

, The usual line-space mechanism includes a line-space lever 4i pivoted to the carriage at 42, and operable in well-known manner, at the return o fthe -carriage, to actuate a usual springretiirned slide 43, which carries a line-space pawl 44 to engage a line-space ratchet-wheel (not shown) for a line-space rotation of the platen. Said line-space lever 4| has the usual handle or finger-piece 45, and its swing is limited by stops 46.

V The means employed to gage the carriage-return to selective paragraphing and non-paragraphing positions will now be described.

vFor engagement with a carriage-return-arrestin'g lug 48 of the margin-stop 35, the carriage is providedwith a counter-stop 49 for non-paragraphing-line starts and another counter-stop 50 for paragraphing-line starts.

- For paragraphing by indentation of the linestart as indicated at 5|, Figure 2, the paragraphcounter-stop 59 is commensurately spaced to the right of the non-paragraphing-counter-stop 49. The paragraph-counter-stop 59 is part of an arm 53 that extends horizontally from a headed pivotstud 54 in vertical leg 22 of the carriage-frame front-bar 22; said arm 53 also presenting the non-paragraphing-counter-stop 49. The counter-stops 49, 5!! and the arm-pivot stud 54 are relatively disposed so that. with said arm 53 in a certain normal position illustrated in Figure 4,

the non-paragraphing-counter-stop 49 is aligned with the margin-stop lug 48, and the paragraphcounter-stop 59 clears said lug; while, with said arm 53 swung to another position, for paragraphing, illustrated in Figure 5, the paragraph-counter-stop 50 is interposed foralignment and coaction with the margin-stop lug 48.

A leaf-spring 55, secured to the arm 53 at 51.

reacts against the under side of horizontal leg 22 of the carriage-frame front-bar 22 to constantly urge the counter-stop-arm 53 to the Figure 5, paragraphing position; and, for normally restraining said counter-stop-arrn 53 in the Figure 4, non-paragraphing position, a companion arm 58 extending from the first arm 53, but to the opposite side of the pivot-stud 54, abuts a latch-pin 59 as at Figure 4.

Movement of the latch-pin 59 from the Figure 4-position to the Figure 5 position brings said latch-pin over a clearance notch 69 of the arm 58, and thereby renders said latch-pin ineffec tive to holdsaid arm 58 and the companion arm 53, whereupon the spring 55 moves the arms 53, 58 to the Figure 5 or paragraphing position which is gaged by abutment of the arm 58 with the under side ofthe horizontal leg 22 of the carriageframe front-bar 22, as at 6|.

Movement of the latch-pin 59 to the Figure 5 position, preparatory to returning the carriage to a paragraphing line-starting position, may be 'efiected expeditiously by the typist co-incidentally with reaching for the carriage-returning, linespacing handle 45 and, for this purpose, the following "devices maybe provided. A paragraphkey 63, disposedadjacent to the carriage-returning and 'line spacefinger-piece 45, is at one end of a rod 64 'which extends to the latch-pin59, the latter being'attachecl to the other end of said rod 64.

The paragraph-key is bent up as at 65 from a portion 66 of the rod 64, which is guided at said portion'for e'ndwi'se sliding movement between a "boss 61 of the carriage-frame and a clip fi8 securedto said boss by a screw 69. The rod 64 extends from said portion 56 by wayof a trans verse part passing under the vertical leg 22 of the carriage-frame front-bar 22 and a stretch Tl running along the b ack of said leg 22 and by a screw 15, Figure 2, to said ear 14 to slidably abut, as'at 16, the'under side of said leg 22 The latch pin 59 is preferably of square cross-section to afford a latching corner, and it will be understood'that its rear end is free of the vertical leg 22 of the carriage-frame front-bar 22.

The typist having momentarily pressed the paragraph-key 63 in reaching for the carriagereturnin'g and line-spacing handle 45, as in Figure 2,'and thereby caused the latch-pin 59 to move over the notch 69 of the arm 58, and the spring 56 to depress the arm 53 to render the paragraph-counter-stop 50 effective, returns the carriage, and incidentally line-spaces by means of said handle 45. The return of the carriage is arrested, and gaged for paragraphing, by abutment of the now effective:paragraph-oounter-stop 59 with the margin-stop-return lug 48, the handle 45 having been incidentally moved to the right relative to the'carriage, as indicated in Figure 5,

tion against a stop I8 is the usual result attending rightward or return movement of the carriage, and, in turn, results in said carriage drop-back movement which is usually about 1 letterspaces.

To utilize the leftward carriage movement for causing restoration of the carriage-arresting counter-stops 49, 58 to the non-paragraphing, Figure 4, condition, following the Figure 5 condition, the following devices are provided.

An elongate restoring element 88 has, at one end-portion 8|, a cam-slot 82 which permanently engages a companion stud 83 in the arm 58. Said restoring element 88 extends from said stud 83, so that its other end-portion 84 is on the same side of the pivot-stud 54 as the counterstop-carrying arm 53, the latter having a pin 86 upon which said other end-portion 84 rests. The restoring element 88 is swingable about the cam-slot stud 83 so that, in the return of the carriage, following the Figure 2 paragraph-linestart-determining condition of the parts, a tip 81 of said restoring element 88 will pass idly over the margin-stop lug 48 to drop behind the latter, see Figure 5, as the carriage-return is arrested by means of said lug 48 and the paragraphcounter-stop 58. Thus, in the ensuing abovementioned drop-back movement of the carriage, the restoring element 88 will not follow the car riage, but will be held back by the margin-stop lug 48, so that it has, in effect, a rightward endwise' movement relative to the carriage. This relative movement, with the cam-slotted end-portion 8I slidably bearing, as at I9, Figure 1, against the under side of the leg 22* of the carriage-frame front-bar 22, enables the restoring element 88 to cause depression of the arm 58 by means of the cam-slot 82 and pin 83. The rod 64, connecting the paragraph-key 63 to the latch-pin 59, is, for restoration, constantly urged leftward by a spring 88, and therefore the latch-pin 59 may co-operate under the force of said spring 88 to complete the depression of the arm 58 after the latter has been partly depressed by the carriage-drop-back movement. To this end, after such partial depression of the arm 58, the latch-pin 59 in escaping from the notch 68 and returning with the springpressed rod 64 tothe normal Figure 4 position Works against a camming bevel 89 of the arm 58, as in Figure 1, to complete the depression of said arm 58.

As the depression of the arm 58 is being completed, the rising tip 81 of the restoring element 88 will escape from the companion face 85 of the margin-stop lug 48, as represented in Figure 1, and, under the pull of a spring 98, the restoring element 88 will thereupon resume a position in which its tip 81 will come to rest. over a sloping top face 92 of the margin-stop lug 48 as the carriage comes to rest at paragraph-line-starting position, after its drop-back movement. In subsequent letter-feeding movement of the carriage to the left, the tip 81 of the restoring element 88 is therefore free to pass from said lug 48, and rest upon the pin 86 as in Figure 4, it being understood that, at said paragraph-line-starting position of the carriage, said tip 81 may rest idly upon the appropriately sloped top face 92 of lug 48, instead of upon said pin 86. It will be further understood that, with the arm 53 and its pin 86 fully restored, that is, raised to the non-paragraphing, Figure 4 position, said pin 86 keeps said restoring-element tip 81 from engaging the margin-stop-lug face 85 at any rightward carriagemovement which would bring said tip 81 to the right of said face 85. 7

It will be seen now that the depression of the arm 58 and the corresponding raising of the counter-stop-carrying arm 53 effected at the drop-back carriage-movement, by means of the restoring element 88 and the co-operation of the spring 88, rod 64 and latch-pin 59, cause restoration of the counter-stops 49, 58 from the paragraphing condition of Figure 5 to the non-paragraphing position of Figure 4.

One end of the paragraphkey-rod-restoring spring 88 may be attached to an car 94 of the p-aragraph-key-rod 64, the other end of said spring being anchored to a clip 95, secured to the carriage-frame front-bar 22 by a screw 96. The restored position of the paragraph-key rod 64 may be determined by abutment of a pin 91 in said rod 64 with the clip 68, as indicated in Figure 4. I

The arm 58 may have a finger-piece 98 extending through a slot 99 at the end of the carriage-frame front-bar 22 and above the latter, so as to be adjacent to the usual auxiliary carriage-return handle I88 provided on the carriage-frame. Upon depressing said finger-piece 98, the non-paragraphing-counter-stop 49, and incidentally the paragraph-counter-stop 58, will be raised clear of the margin-stop lug 48, as in Figure 6, to permit rightward carriage-movement, as by means of said auxiliary handle I88, beyond the position determined by the margin stop 36. Depression of the finger-piece 98 and the consequent rocking of the arms 53, 58 are also effective and useful for canceling an operation of the paragraph-key 63 before the carriage is returned. Thus, following the Figure 2 condition, in which the paragraphing-counter-stop 58 has been made effective by operation of the paragraph-key 63, depression of the finger-piece 98 will release the latch-pin 59 from the hold of the side of the arm-notch 88 as arm 58 is depressed, and consequently permit restoration by the spring 88 of the rod 64 and its paragraphkey 63 to the normal Figure 4 position.

The non-paragraphing-counter-stop 49 may be formed integrally with the arm 53 by shaping and bending the end of the latter, as best seen in Figure 2. The paragraph-counter-stop 58 may be a separate piece secured to the arm 53 by rivets I8I, one of said rivets also serving as an anchor-pin for the restoring-element spring 98, the counter-stop (58) piece having a slot I82 to permit said spring to be hooked over the rivet. A camming bevel 93 upon the paragraph-counter-stop 58 enables the latter to override the margin-stop lug 48 and incidentally become restored thereby in case said counterstop 58 has been depressed by operation of the paragraph-key 63, while the carriage is in position with' the paragraph-counter-stop 58 behind the margin-stop lug 48 like in Figure 4.

Details of the operation of the mechanism will be clear from the foregoing description, and the operation may be summarized as follows:

The margin-stop 36 is first set along the rods 25, 31 to a position corresponding to the desired margin at the left of the work-sheet H. The blank sheet I1 is inserted in the carriage, preferably while the carriage 'is at its extreme left position, as determined by the usual left margin-stop (not shown), or While the carriage is at any other position to the left of a paragraphing-line-start position, so that the start of the first line on the work-sheetmay bedetermi ned' by returning the carriage to a position gag ed either by means of the no-paragraph-counterstop 69 or the paragraph-counter-stop 50. Should the typist want to return the carriage for a paragraph-line start, whether it be at the first line of the page, as indicated at Figure 2, or at any subsequent line, as indicated at the imaginary character I03, Figure 5, the paragraphkey 63 need only be momentarily pressed, and therefore .such pressing of the paragraph-key may be effected with substantially the same motion of the hand the. typist uses in reaching for the carriage-returning and line-spacing fingerpiece 45. Upon such easily executed, time-saving operation of the novel paragraph-key 63, it will follow that the carriage, by its return, will be gaged to paragraph-line-starting position.

, No further attention is required of the typist to other words, the typists hand while returning the carriage to a paragraph-line start is occupied only, and in the usual way, with the conventional carriage-returning and line-spacing handle 45. Should the paragraph-key 63 be pressed and the carriage thereupon not be returned to paragraphing position, said key, remaining in operated position, like in Figure 5, will enable the operator to note that the para graphing-counter-stop 50 has been rendered effective.

It will be seen from the foregoing that'anadjustably fixed stop or margin-gage 48 is provided upon the machine-frame, in the path of a counter-stop 49 that is provided upon the carriage; and that 48 and 49 normally co-operate tolimit the return travel of the carriage; that there is also provided upon the carriage a paragraphing-counter-stop 56, which is normally latched up in idle position, but Whose function is toshorten the return stroke of the carriage, to bringthe same to rest at the point tobegin the typing of the indented first line of the next paragraph. I These main and paragraphing stops are carried by a single lever 53, pivoted on the carriage and having a depressible finger-piece 98 for the usual purpose of by-passing the fixed stop 48 at will. Normally the latch 59 holds the lever in normal position against the tension of spring 56. 7

To bring the paragraphing-stop into action when desired, there is provided, near the usual forwardly-projecting handle 45 which returns the carriage and line-spaces the platen, a special finger-piece 63, which may be manipulated at the same rightward stroke of the left hand that puts said carriage-returning handle into motion. This finger-piece releases the lever from the control of latch 59, and the lever vibrates, together with the paragraphing-stop 56 thereon, to set it to position to be intercepted by the fixed stop 48, to arrest the carriage when it reaches paragraphing-position. For automatically raising said paragraphing-stop 5D to idle normal position, there is provided upon the carriage a paragraph-stop releaser 80. The first movement of this releaser is in the nature of a drop to position to be intercepted by the aforesaidmachine-framestop 48, just at the beginning of the ensuing drop or leftward movement of the carriage. This drop has considerable extent, the releaser 80 remaining in engagement with fixed stop 48, and hence being misplaced thereby. During such misplacement, the releaser 80 effects the restoration of the lever 53 and paragraphin'gstop 50 to normal idle position, and the releaser itself is raised to normal idle position, so that it travels idly over the fixed stop 48. Said releaser is mounted upon the same lever with the main stop 49 and the paragraphing-stop 59. The spring 56 tends constantly to depress the lefthand end of said lever, to maintain the main stop 49 in normal working position. However, the leftward movement of the aforesaid fingerpiece 63 has the effect of vibrating said lever, and thereby releasing it from the latch 59, and permitting the spring 56 to depress it far enough to bring the paragraphing-stop 52! into working position.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:

1. The combination with a letter-feeding typewriter-carriage, of carriage-return-gaging mechanism designed for facilitating determination of carriage-return to paragraphing, instead of nonparagraphing, line-starting position, said mechanism including a stationary stop, two counterstops on the carriage for engaging said stationary stop and usable respectively for paragraphing and non-paragraphing, whereby one of said counter-stops is placeable in effective or ineffective position relative to said stationary stop, and a paragraphing-key cooperative with said latch-and-spring device, in response to a momentary manual pressure on said key, to place and maintain said one counter-stop in one of its positions, to thereby render the paragraph-counter stop effective at a carriagereturn operation, means being provided whereby following the carriage-return 'to paragraphingposition said one counter-stop is automatically replacedin its other position, under control of said latch-and-spring device, to thereby automatically render the no-paragraph counter-stop effective.

2. The combination with a letter-feeding typewriter-carriage, of carriage-return-gaging mechanism designed for facilitating determination of carriage-return to paragraphing, instead of nonparagraphing, line-starting position, said mechanism including a stationary stop, two counterstops on the carriage for engaging said stationary stop and usable respectively for paragraphing and non-paragraphing, a latch-and-spring device whereby one of said counter-stops is placeable in effective or ineffective position relative to said stationary stop, a paragraphing-key co-operative with said latch-and-spring device, in response to a momentary manual pressure on said key, to place and maintain said one counter-stop in one of its positions, to thereby render the paragraphcounter stop effective at a carriage-return operation, and means operable by the carriageadvance movement following its return to paragraphing-position to replace, under the control of said latch-and-spring device, said counter-stop in its other position, to thereby automatically render the no-paragraph counter-stop effective.

3. The invention as set forth in claim 1, said carriage having a carriage-returning and linea latch-and-spring device spacing handle, and said key being arranged and thereby placed on the carriage adjacent said. handle, whereby the typist in reaching for said handle, preparatory to a paragraphing carriagereturn, can coincidentally press said key.

4. The invention as set forth in claim 1, said stationary stop being settable at different stations along the range of carriage-travel, and said carriage-return-gaging mechanism being operative for paragraphing and non-paragraphing at any station.

5. In a typewriting machine, the combination with a letter-feeding carriage, of a stationary carriage-return stop, a counter-stop on the carriage shiftable at will from an ineffective position to an effective position, to coact with said stationary stop for gaging the carriage-return movement to a certain position, and means on the carriage connected to said counter-stop and arranged to be displaced by means of said stationary stop by the advance movement of the carriage following its return, and thereby cause automatic restoration of said counter-stop to ineffective position.

6. In a typewriting machine, the combination with a letter-feeding carriage and a non-traveling carriage-return-arresting stop, of two counter-stops on the carriage for selective coaction with said non-traveling stop to gage the carriagereturn to two different places, one of said stops being movable in opposite shifts, so that in one position it is effective to coact with said nontraveling stop to the exclusion of the other counter-stop, or is ineffective in another position to thereby render said other counter-stop effective, one of said shifts being effected manually at will, and means whereby, in consequence of said one shift to determine corresponding gaging of the carriage-return to one place, the carriage advance movement subsequent to said return automatically effects the opposite shift to automatically determine that a subsequent carriagereturn will be to the other of said places.

'7. In a typewriting machine, the combination with a letter-feeding carriage, of a carriage-return-gaging stop normally in ineffective position, a stop-controlling key, means whereby in response to a momentary pressure upon said key said stop is shifted to and maintained in effective position, and means whereby said stop is automatically restored to ineffective position by advance movement of the carriage following the carriage-return gaged by said stop.

8. In a typewriting machine, the combination with a letter-feeding carriage, of a stationary stop, a counter-stop on the carriage shiftable at will, from a normally ineffective position, to an effective position to coact with said stationary stop, and means on the carriage connected to said counter-stop and arranged to be displaced by said stationary stop at advance movement of the carriage following the carriage-return, whereby said advance movement causes restoration of said counter-stop to ineffective position, said means being arranged so that said stationary stop is neutral relatively thereto during the return-carriage movement.

9. In a typewriting machine, the combination with a letter-feeding carriage, of a carriage-return-gaging stop normally in ineffective position, a stop-controlling key, means whereby in response to a momentary pressure upon said key said stop is shifted to and maintained in effective position, means whereby said stop is automatically restored to ineffective position by ing handle, said handle being movable relative to the carriage and thereby also operative for line-spacing the platen incidentally to the carriage-return, of a carriage-return-gaging stop on said carriage normally in ineffective position, a stop-controlling key on the carriage adjacent said handle, means whereby, in response to a mo.- mentarypressure upon said key executed as the typist reaches for said handle, said stop is shifted to and maintained in efiective position, and means whereby said stop is automatically restored to ineffective position by advance movement of the carriage following the carriage-return gaged by said stop.

11. In a. typewriting machine, the combination with a platen-carriage having a carriage-returning handle, said handle being movable relative to the carriage and thereby also operative for line-spacing the platen incidentally to the carriage-return, of a carriagereturn-gaging stop on said carriage normally in ineffective position, a stop-controlling key on the carriage adjacent said handle, and means whereby, in response to a momentary pressure upon said key executed as the typist reaches for said handle, said stop is shifted to and maintained in effective position, means being provided for restoring said stop, independently of said key, to ineffective position following the carriage-return.

12. In a typewriter-carriage-return-stop mechnism, the combination with a stationary stop, of a counter-stop on the carriage shiftable into and out of line with said stationary stop, a latch-andspring device operable either for holding said counter-stop in one position or for releasing it for a consequent shift to another position, said counter-stop being effective in one position for engaging said stationary stop and ineffective, for engaging said stationary stop, in the other position, and means whereby carriage-advance movement, subsequent to a carriage-return effected while the counter-stop is in one position, automatically puts said counter-stop, under control of said latch-and-spring device, in the other position.

13. In a typewriter-carriage-return-stop mechanism the combination with a stationary stop, of a counter-stop on the carriage shiftable into and out of line with said stationary stop, a latch-and-spring device operable either for holding said counter-stop in one position or for releasing it for a consequent shift to another position, said counter-stop being effective in one position for engaging said stationary stop and ineffective, for engaging said stationary stop, in the other position, a, key, co-operative, by a momentary manual pressure thereon, with said latchand-spring device to put said counter-stop in one of said positions, and means whereby the carriage-advance movement, subsequent toa carriage-return effected while the counter-stop is in said one position, automatically puts said counterstop, under control of said latch-and-spring device, in the other position.

14. In a typewriter-carriage-return-stop mechanism, the combination with a stationary stop, of a counter-stop on the carriage shiftable into and out of line with said stationary stop, a latchand-spring device operable either for holding said counter-stop in one position or for releasing it for a consequent shift to another position, said counter-stop being effective in one position for engaging said stationary stop and ineffective, for engaging said stationary stop, in the other position, a key, co-operative, by a momentary manual pressure thereon, with said latch-and-spring device to put said counter-stop in one of said positions, and another key, co-operative, after operation of the first key, with said latch-and-spring device to put said counter-stop in the other position.

15. In a typewriting machine, the combination with a letter-feeding carriage, of two stops for selective coaction with a common companion stop to gage return of the carriage to two'difierent positions, a key, means responsive to a momentary pressure upon said key to render one of said stops effective for coaction with said companion stop and to conversely exclude coaction of the other stop with said companion stop, and means responsive to advance movement of the carriage subsequent to its return to the position gaged by said effective stop, to automatically render the latter ineffective, and conversely render said other stop effective for coaction with said companion stop.

16. In a typewriting machine, the combination with a letter-feeding carriage and a stationary carriage-return stop, of two counter-stops on said carriage for selective coaction with said stationary stop, to gage the carriage-return to two different places, and counter-stop-control means including provision whereby one of said counterstops may be effective, at will, to coact with said stationary stop to the exclusion of the other counter-stop, said counter-stop-control means also including provision whereby the carriage-advance subsequent to return of the carriage to the position gaged by said effective counter-stop automatically renders the latter ineffective, and, conversely, renders the other counter-stop effective, said counter-stop-control means further including provision for shifting both counter-stops clear of said stationary stop, to permit return of the carriage beyond the stationary stop-determined limit.

17. In a typing machine, the combination with a letter-feeding carriage, of a stop for gaging return of the carriage to a certain position, said stop being shiftable and normally out of line with a companion stop, means operable at will incidentally to a return of the carriage to shift and thereby align said stop with said companion stop, and means operated by advance movement of the carriage, following its return, to automatically cause said stop to be shifted out of line relative to said companion stop again.

18. In a typing machine, the combination with a carriage and a letter-feeding escapement-mechanism therefor, of a normally ineffective positioned stop for gaging return of said carriage to a certain position, said carriage being arrestable by said stop at a point beyond, said position, and

the carriage having a drop-back movement from said point to said position due to a certain property of said escapement-mechanism, means operable, at will, incidentally to a return of the carriage, to shift said stop to effective position, and means operated by said carriage-drop-back movement to automatically cause said stop to be restored to its ineffective position.

19. In a typewriting machine, the combination with a letter-feeding carriage carrying a linespace lever, of a carriage-return-gaging stop normally in ineffective position, a stop-controlling key mounted on the carriage near the line-space lever for concomitant actuation therewith, means whereby, in response to a momentary pressure upon said key, said stop is shifted to effective position, means for maintaining said stop in effective position, and another key mounted on the carriage and operable to restore said stop to ineffective position.

20. In a typewriting machine, the combination with a carriage and an adjustably fixed stop, of a lever pivoted upon said carriage having a main counter-stop, said lever being settable to permit the counter-stop to by-pass the fixed stop when required, a paragraphing counter stop also mounted upon said lever and normally in raised idle position, a spring tending to vibrate said 1ever to drop said paragraphing-stop, a latch maintaining said lever in normal position against the tension of said spring, and a finger-piece upon the carriage connected to said latch to move the same to release said lever and permit the spring to vibrate the lever with the paragraphing-stop to position to co-operate with the fixed stop.

21. In a typewriting machine, the combination with a carriage and an adjustably fixed stop, of a lever pivoted upon said carriage having a main counter-stop, said lever being settable to permit the counter-stop to by-pass the fixed stop when required, a paragraphing counter stop also mounted upon said lever and normally in raised idle position, a spring tending to vibrate said lever to drop said paragraphing-stop, a latch maintaining said lever in normal position against the tension of said spring, a finger-piece upon the carriage connected to said latch to move the same to release said lever and permit the spring to vibrate the lever with the paragraphing-stop to position to co-operate with the fixed stop, .a releaser also mounted upon said lever to be effective during the initial idle drop ofthe carriage preparatory to beginning the typing of the indented line of the paragraph, said releaser dropping with said lever to a point .where the releaser is arrested by the fixed stop while the carriage is making said initial drop, and means to enable the relative movement of the lever and carriage to effect the relatching of the lever in normal position, thereby restoring the paragraphing-sto'p and the releaser to normal positions in which they travel idly over said fixed stop.

JESSE A. B. SMITH.

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